perf tools: Add data object to handle perf data file

This patch is adding 'struct perf_data_file' object as a placeholder for
all attributes regarding perf.data file handling. Changing
perf_session__new to take it as an argument.

The rest of the functionality will be added later to keep this change
simple enough, because all the places using perf_session are changed
now.

Signed-off-by: Jiri Olsa <jolsa@redhat.com>
Acked-by: Namhyung Kim <namhyung@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1381847254-28809-2-git-send-email-jolsa@redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --cc tools/perf/builtin-annotate.c
Simple merge

diff --cc tools/perf/builtin-buildid-cache.c
Simple merge

diff --cc tools/perf/builtin-buildid-list.c
Simple merge

diff --cc tools/perf/builtin-diff.c
Simple merge

diff --cc tools/perf/builtin-evlist.c
Simple merge

diff --cc tools/perf/builtin-inject.c
Simple merge

diff --cc tools/perf/builtin-kmem.c
Simple merge

diff --cc tools/perf/builtin-kvm.c
Simple merge

diff --cc tools/perf/builtin-lock.c
Simple merge

diff --cc tools/perf/builtin-mem.c
Simple merge

diff --cc tools/perf/builtin-record.c
Simple merge

diff --cc tools/perf/builtin-report.c
Simple merge

diff --cc tools/perf/builtin-sched.c
Simple merge

diff --cc tools/perf/builtin-script.c
Simple merge

diff --cc tools/perf/builtin-timechart.c
Simple merge

diff --cc tools/perf/builtin-top.c
Simple merge

diff --cc tools/perf/builtin-trace.c
Simple merge

diff --cc tools/perf/perf.h
Simple merge

diff --cc tools/perf/util/data.h
Simple merge

diff --cc tools/perf/util/session.c
Simple merge

diff --cc tools/perf/util/session.h
Simple merge